2 * nsh_api.c - nsh mapping api
4 * Copyright (c) 2019 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 #include <vnet/vnet.h>
18 #include <vnet/plugin/plugin.h>
21 #include <vlibapi/api.h>
22 #include <vlibmemory/api.h>
23 #include <vpp/app/version.h>
25 /* define message IDs */
26 #define vl_msg_id(n,h) n,
29 #include <nsh/nsh.api.h>
30 /* We'll want to know how many messages IDs we need... */
31 VL_MSG_FIRST_AVAILABLE,
35 /* define message structures */
37 #include <nsh/nsh.api.h>
40 /* define generated endian-swappers */
42 #include <nsh/nsh.api.h>
45 /* instantiate all the print functions we know about */
46 #define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
48 #include <nsh/nsh.api.h>
51 /* Get the API version number */
52 #define vl_api_version(n,v) static u32 api_version=(v);
53 #include <nsh/nsh.api.h>
56 #define vl_msg_name_crc_list
57 #include <nsh/nsh.api.h>
58 #undef vl_msg_name_crc_list
60 #define REPLY_MSG_ID_BASE nm->msg_id_base
61 #include <vlibapi/api_helper_macros.h>
63 /* List of message types that this plugin understands */
65 #define foreach_nsh_plugin_api_msg \
66 _(NSH_ADD_DEL_ENTRY, nsh_add_del_entry) \
67 _(NSH_ENTRY_DUMP, nsh_entry_dump) \
68 _(NSH_ADD_DEL_MAP, nsh_add_del_map) \
69 _(NSH_MAP_DUMP, nsh_map_dump)
72 * @brief CLI function for NSH admin up/down
82 nsh_interface_admin_up_down (vnet_main_t * vnm, u32 nsh_hw_if, u32 flags)
84 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
85 vnet_hw_interface_set_flags (vnm, nsh_hw_if,
86 VNET_HW_INTERFACE_FLAG_LINK_UP);
88 vnet_hw_interface_set_flags (vnm, nsh_hw_if, 0);
94 dummy_interface_tx (vlib_main_t * vm,
95 vlib_node_runtime_t * node, vlib_frame_t * frame)
97 clib_warning ("you shouldn't be here, leaking buffers...");
98 return frame->n_vectors;
102 * @brief Naming for NSH tunnel
104 * @param *s formatting string
107 * @return *s formatted string
111 format_nsh_name (u8 * s, va_list * args)
113 u32 dev_instance = va_arg (*args, u32);
114 return format (s, "nsh_tunnel%d", dev_instance);
118 VNET_DEVICE_CLASS (nsh_device_class, static) = {
120 .format_device_name = format_nsh_name,
121 .tx_function = dummy_interface_tx,
122 .admin_up_down_function = nsh_interface_admin_up_down,
126 static void send_nsh_entry_details
127 (nsh_entry_t * t, vl_api_registration_t * rp, u32 context)
129 vl_api_nsh_entry_details_t *rmp;
130 nsh_main_t *nm = &nsh_main;
132 rmp = vl_msg_api_alloc (sizeof (*rmp));
133 clib_memset (rmp, 0, sizeof (*rmp));
135 rmp->_vl_msg_id = ntohs ((VL_API_NSH_ENTRY_DETAILS) + nm->msg_id_base);
136 rmp->ver_o_c = t->nsh_base.ver_o_c;
137 rmp->ttl = (t->nsh_base.ver_o_c & NSH_TTL_H4_MASK) << 2 |
138 (t->nsh_base.length & NSH_TTL_L2_MASK) >> 6;
139 rmp->length = t->nsh_base.length & NSH_LEN_MASK;
140 rmp->md_type = t->nsh_base.md_type;
141 rmp->next_protocol = t->nsh_base.next_protocol;
142 rmp->nsp_nsi = htonl (t->nsh_base.nsp_nsi);
144 if (t->nsh_base.md_type == 1)
147 rmp->c1 = htonl (t->md.md1_data.c1);
148 rmp->c2 = htonl (t->md.md1_data.c2);
149 rmp->c3 = htonl (t->md.md1_data.c3);
150 rmp->c4 = htonl (t->md.md1_data.c4);
152 else if (t->nsh_base.md_type == 2)
154 rmp->tlv_length = t->tlvs_len;
155 clib_memcpy (rmp->tlv, t->tlvs_data, t->tlvs_len);
158 rmp->context = context;
160 vl_api_send_msg (rp, (u8 *) rmp);
163 static void send_nsh_map_details
164 (nsh_map_t * t, vl_api_registration_t * rp, u32 context)
166 vl_api_nsh_map_details_t *rmp;
167 nsh_main_t *nm = &nsh_main;
169 rmp = vl_msg_api_alloc (sizeof (*rmp));
170 clib_memset (rmp, 0, sizeof (*rmp));
172 rmp->_vl_msg_id = ntohs ((VL_API_NSH_MAP_DETAILS) + nm->msg_id_base);
173 rmp->nsp_nsi = htonl (t->nsp_nsi);
174 rmp->mapped_nsp_nsi = htonl (t->mapped_nsp_nsi);
175 rmp->nsh_action = htonl (t->nsh_action);
176 rmp->sw_if_index = htonl (t->sw_if_index);
177 rmp->rx_sw_if_index = htonl (t->rx_sw_if_index);
178 rmp->next_node = htonl (t->next_node);
180 rmp->context = context;
182 vl_api_send_msg (rp, (u8 *) rmp);
186 vl_api_nsh_map_dump_t_handler (vl_api_nsh_map_dump_t * mp)
188 nsh_main_t *nm = &nsh_main;
191 vl_api_registration_t *rp;
193 rp = vl_api_client_index_to_registration (mp->client_index);
197 map_index = ntohl (mp->map_index);
201 pool_foreach (t, nm->nsh_mappings, (
203 send_nsh_map_details (t, rp,
210 if (map_index >= vec_len (nm->nsh_mappings))
214 t = &nm->nsh_mappings[map_index];
215 send_nsh_map_details (t, rp, mp->context);
219 /** API message handler */
221 vl_api_nsh_add_del_map_t_handler (vl_api_nsh_add_del_map_t * mp)
223 vl_api_nsh_add_del_map_reply_t *rmp;
224 nsh_main_t *nm = &nsh_main;
226 nsh_add_del_map_args_t _a, *a = &_a;
229 a->is_add = mp->is_add;
230 a->map.nsp_nsi = ntohl (mp->nsp_nsi);
231 a->map.mapped_nsp_nsi = ntohl (mp->mapped_nsp_nsi);
232 a->map.nsh_action = ntohl (mp->nsh_action);
233 a->map.sw_if_index = ntohl (mp->sw_if_index);
234 a->map.rx_sw_if_index = ntohl (mp->rx_sw_if_index);
235 a->map.next_node = ntohl (mp->next_node);
237 rv = nsh_add_del_map (a, &map_index);
239 if ((a->map.next_node == NSH_NODE_NEXT_ENCAP_VXLAN4)
240 | (a->map.next_node == NSH_NODE_NEXT_ENCAP_VXLAN6))
242 rv = nsh_add_del_proxy_session (a);
245 REPLY_MACRO2 (VL_API_NSH_ADD_DEL_MAP_REPLY, (
254 nsh_header_rewrite (nsh_entry_t * nsh_entry)
258 nsh_base_header_t *nsh_base;
259 nsh_md1_data_t *nsh_md1;
260 nsh_main_t *nm = &nsh_main;
261 nsh_md2_data_t *opt0;
262 nsh_md2_data_t *limit0;
263 nsh_md2_data_t *nsh_md2;
264 nsh_option_map_t _nsh_option, *nsh_option = &_nsh_option;
265 u8 old_option_size = 0;
266 u8 new_option_size = 0;
268 vec_free (nsh_entry->rewrite);
269 if (nsh_entry->nsh_base.md_type == 1)
271 len = sizeof (nsh_base_header_t) + sizeof (nsh_md1_data_t);
273 else if (nsh_entry->nsh_base.md_type == 2)
275 /* set to maxim, maybe dataplane will add more TLVs */
276 len = MAX_NSH_HEADER_LEN;
278 vec_validate_aligned (rw, len - 1, CLIB_CACHE_LINE_BYTES);
279 clib_memset (rw, 0, len);
281 nsh_base = (nsh_base_header_t *) rw;
282 nsh_base->ver_o_c = nsh_entry->nsh_base.ver_o_c;
283 nsh_base->length = nsh_entry->nsh_base.length;
284 nsh_base->md_type = nsh_entry->nsh_base.md_type;
285 nsh_base->next_protocol = nsh_entry->nsh_base.next_protocol;
286 nsh_base->nsp_nsi = clib_host_to_net_u32 (nsh_entry->nsh_base.nsp_nsi);
288 if (nsh_base->md_type == 1)
290 nsh_md1 = (nsh_md1_data_t *) (rw + sizeof (nsh_base_header_t));
291 nsh_md1->c1 = clib_host_to_net_u32 (nsh_entry->md.md1_data.c1);
292 nsh_md1->c2 = clib_host_to_net_u32 (nsh_entry->md.md1_data.c2);
293 nsh_md1->c3 = clib_host_to_net_u32 (nsh_entry->md.md1_data.c3);
294 nsh_md1->c4 = clib_host_to_net_u32 (nsh_entry->md.md1_data.c4);
295 nsh_entry->rewrite_size = 24;
297 else if (nsh_base->md_type == 2)
299 opt0 = (nsh_md2_data_t *) (nsh_entry->tlvs_data);
300 limit0 = (nsh_md2_data_t *) ((u8 *) opt0 + nsh_entry->tlvs_len);
302 nsh_md2 = (nsh_md2_data_t *) (rw + sizeof (nsh_base_header_t));
303 nsh_entry->rewrite_size = sizeof (nsh_base_header_t);
305 while (opt0 < limit0)
307 old_option_size = sizeof (nsh_md2_data_t) + opt0->length;
308 /* round to 4-byte */
309 old_option_size = ((old_option_size + 3) >> 2) << 2;
311 nsh_option = nsh_md2_lookup_option (opt0->class, opt0->type);
312 if (nsh_option == NULL)
317 if (nm->add_options[nsh_option->option_id] != NULL)
319 if (0 != nm->add_options[nsh_option->option_id] ((u8 *) nsh_md2,
325 /* round to 4-byte */
326 new_option_size = ((new_option_size + 3) >> 2) << 2;
328 nsh_entry->rewrite_size += new_option_size;
330 (nsh_md2_data_t *) (((u8 *) nsh_md2) + new_option_size);
331 opt0 = (nsh_md2_data_t *) (((u8 *) opt0) + old_option_size);
336 opt0 = (nsh_md2_data_t *) (((u8 *) opt0) + old_option_size);
342 nsh_entry->rewrite = rw;
343 nsh_base->length = (nsh_base->length & NSH_TTL_L2_MASK) |
344 ((nsh_entry->rewrite_size >> 2) & NSH_LEN_MASK);
349 extern vnet_hw_interface_class_t nsh_hw_class;
352 * Action function to add or del an nsh map.
353 * Shared by both CLI and binary API
356 nsh_add_del_map (nsh_add_del_map_args_t * a, u32 * map_indexp)
358 nsh_main_t *nm = &nsh_main;
359 vnet_main_t *vnm = nm->vnet_main;
365 vnet_hw_interface_t *hi;
369 /* net order, so data plane could use nsh header to lookup directly */
370 key = clib_host_to_net_u32 (a->map.nsp_nsi);
372 entry = hash_get_mem (nm->nsh_mapping_by_key, &key);
376 /* adding an entry, must not already exist */
378 return -1; //TODO API_ERROR_INVALID_VALUE;
380 pool_get_aligned (nm->nsh_mappings, map, CLIB_CACHE_LINE_BYTES);
381 clib_memset (map, 0, sizeof (*map));
383 /* copy from arg structure */
384 map->nsp_nsi = a->map.nsp_nsi;
385 map->mapped_nsp_nsi = a->map.mapped_nsp_nsi;
386 map->nsh_action = a->map.nsh_action;
387 map->sw_if_index = a->map.sw_if_index;
388 map->rx_sw_if_index = a->map.rx_sw_if_index;
389 map->next_node = a->map.next_node;
390 map->adj_index = a->map.adj_index;
393 key_copy = clib_mem_alloc (sizeof (*key_copy));
394 clib_memcpy (key_copy, &key, sizeof (*key_copy));
396 hash_set_mem (nm->nsh_mapping_by_key, key_copy, map - nm->nsh_mappings);
397 map_index = map - nm->nsh_mappings;
399 if (vec_len (nm->free_nsh_tunnel_hw_if_indices) > 0)
401 nsh_hw_if = nm->free_nsh_tunnel_hw_if_indices
402 [vec_len (nm->free_nsh_tunnel_hw_if_indices) - 1];
403 _vec_len (nm->free_nsh_tunnel_hw_if_indices) -= 1;
405 hi = vnet_get_hw_interface (vnm, nsh_hw_if);
406 hi->dev_instance = map_index;
407 hi->hw_instance = hi->dev_instance;
411 nsh_hw_if = vnet_register_interface
412 (vnm, nsh_device_class.index, map_index, nsh_hw_class.index,
414 hi = vnet_get_hw_interface (vnm, nsh_hw_if);
415 hi->output_node_index = nsh_aware_vnf_proxy_node.index;
418 map->nsh_hw_if = nsh_hw_if;
419 map->nsh_sw_if = nsh_sw_if = hi->sw_if_index;
420 vec_validate_init_empty (nm->tunnel_index_by_sw_if_index, nsh_sw_if,
422 nm->tunnel_index_by_sw_if_index[nsh_sw_if] = key;
424 vnet_sw_interface_set_flags (vnm, hi->sw_if_index,
425 VNET_SW_INTERFACE_FLAG_ADMIN_UP);
430 return -2; //TODO API_ERROR_NO_SUCH_ENTRY;
432 map = pool_elt_at_index (nm->nsh_mappings, entry[0]);
434 vnet_sw_interface_set_flags (vnm, map->nsh_sw_if,
435 VNET_SW_INTERFACE_FLAG_ADMIN_DOWN);
436 vec_add1 (nm->free_nsh_tunnel_hw_if_indices, map->nsh_sw_if);
437 nm->tunnel_index_by_sw_if_index[map->nsh_sw_if] = ~0;
439 hp = hash_get_pair (nm->nsh_mapping_by_key, &key);
440 key_copy = (void *) (hp->key);
441 hash_unset_mem (nm->nsh_mapping_by_key, &key);
442 clib_mem_free (key_copy);
444 pool_put (nm->nsh_mappings, map);
448 *map_indexp = map_index;
454 * Action function to add or del an nsh-proxy-session.
455 * Shared by both CLI and binary API
458 nsh_add_del_proxy_session (nsh_add_del_map_args_t * a)
460 nsh_main_t *nm = &nsh_main;
461 nsh_proxy_session_t *proxy = 0;
462 nsh_proxy_session_by_key_t key, *key_copy;
465 u32 nsp = 0, nsi = 0;
467 clib_memset (&key, 0, sizeof (key));
468 key.transport_type = a->map.next_node;
469 key.transport_index = a->map.sw_if_index;
471 entry = hash_get_mem (nm->nsh_proxy_session_by_key, &key);
475 /* adding an entry, must not already exist */
477 return -1; //TODO API_ERROR_INVALID_VALUE;
479 pool_get_aligned (nm->nsh_proxy_sessions, proxy, CLIB_CACHE_LINE_BYTES);
480 clib_memset (proxy, 0, sizeof (*proxy));
482 /* Nsi needs to minus 1 within NSH-Proxy */
483 nsp = (a->map.nsp_nsi >> NSH_NSP_SHIFT) & NSH_NSP_MASK;
484 nsi = a->map.nsp_nsi & NSH_NSI_MASK;
489 /* net order, so could use it to lookup nsh map table directly */
490 proxy->nsp_nsi = clib_host_to_net_u32 ((nsp << NSH_NSP_SHIFT) | nsi);
492 key_copy = clib_mem_alloc (sizeof (*key_copy));
493 clib_memcpy (key_copy, &key, sizeof (*key_copy));
495 hash_set_mem (nm->nsh_proxy_session_by_key, key_copy,
496 proxy - nm->nsh_proxy_sessions);
501 return -2; //TODO API_ERROR_NO_SUCH_ENTRY;
503 proxy = pool_elt_at_index (nm->nsh_proxy_sessions, entry[0]);
504 hp = hash_get_pair (nm->nsh_proxy_session_by_key, &key);
505 key_copy = (void *) (hp->key);
506 hash_unset_mem (nm->nsh_proxy_session_by_key, &key);
507 clib_mem_free (key_copy);
509 pool_put (nm->nsh_proxy_sessions, proxy);
516 * Action function for adding an NSH entry
517 * nsh_add_del_entry_args_t *a: host order
520 nsh_add_del_entry (nsh_add_del_entry_args_t * a, u32 * entry_indexp)
522 nsh_main_t *nm = &nsh_main;
523 nsh_entry_t *nsh_entry = 0;
527 u32 entry_index = ~0;
531 /* host order, because nsh map table stores nsp_nsi in host order */
532 key = a->nsh_entry.nsh_base.nsp_nsi;
534 entry_id = hash_get_mem (nm->nsh_entry_by_key, &key);
538 /* adding an entry, must not already exist */
540 return -1; // TODO VNET_API_ERROR_INVALID_VALUE;
542 pool_get_aligned (nm->nsh_entries, nsh_entry, CLIB_CACHE_LINE_BYTES);
543 clib_memset (nsh_entry, 0, sizeof (*nsh_entry));
545 /* copy from arg structure */
546 #define _(x) nsh_entry->nsh_base.x = a->nsh_entry.nsh_base.x;
547 foreach_copy_nsh_base_hdr_field;
550 if (a->nsh_entry.nsh_base.md_type == 1)
552 nsh_entry->md.md1_data.c1 = a->nsh_entry.md.md1_data.c1;
553 nsh_entry->md.md1_data.c2 = a->nsh_entry.md.md1_data.c2;
554 nsh_entry->md.md1_data.c3 = a->nsh_entry.md.md1_data.c3;
555 nsh_entry->md.md1_data.c4 = a->nsh_entry.md.md1_data.c4;
557 else if (a->nsh_entry.nsh_base.md_type == 2)
559 vec_free (nsh_entry->tlvs_data);
560 tlvs_len = a->nsh_entry.tlvs_len;
561 vec_validate_aligned (data, tlvs_len - 1, CLIB_CACHE_LINE_BYTES);
563 clib_memcpy (data, a->nsh_entry.tlvs_data, tlvs_len);
564 nsh_entry->tlvs_data = data;
565 nsh_entry->tlvs_len = tlvs_len;
566 vec_free (a->nsh_entry.tlvs_data);
569 nsh_header_rewrite (nsh_entry);
571 key_copy = clib_mem_alloc (sizeof (*key_copy));
572 clib_memcpy (key_copy, &key, sizeof (*key_copy));
574 hash_set_mem (nm->nsh_entry_by_key, key_copy,
575 nsh_entry - nm->nsh_entries);
576 entry_index = nsh_entry - nm->nsh_entries;
581 return -2; //TODO API_ERROR_NO_SUCH_ENTRY;
583 nsh_entry = pool_elt_at_index (nm->nsh_entries, entry_id[0]);
584 hp = hash_get_pair (nm->nsh_entry_by_key, &key);
585 key_copy = (void *) (hp->key);
586 hash_unset_mem (nm->nsh_entry_by_key, &key);
587 clib_mem_free (key_copy);
589 vec_free (nsh_entry->tlvs_data);
590 vec_free (nsh_entry->rewrite);
591 pool_put (nm->nsh_entries, nsh_entry);
595 *entry_indexp = entry_index;
601 /** API message handler */
602 static void vl_api_nsh_add_del_entry_t_handler
603 (vl_api_nsh_add_del_entry_t * mp)
605 vl_api_nsh_add_del_entry_reply_t *rmp;
606 nsh_main_t *nm = &nsh_main;
608 nsh_add_del_entry_args_t _a, *a = &_a;
609 u32 entry_index = ~0;
613 a->is_add = mp->is_add;
614 a->nsh_entry.nsh_base.ver_o_c =
615 (mp->ver_o_c & 0xF0) | ((mp->ttl & NSH_LEN_MASK) >> 2);
616 a->nsh_entry.nsh_base.length =
617 (mp->length & NSH_LEN_MASK) | ((mp->ttl & 0x3) << 6);
618 a->nsh_entry.nsh_base.md_type = mp->md_type;
619 a->nsh_entry.nsh_base.next_protocol = mp->next_protocol;
620 a->nsh_entry.nsh_base.nsp_nsi = ntohl (mp->nsp_nsi);
621 if (mp->md_type == 1)
623 a->nsh_entry.md.md1_data.c1 = ntohl (mp->c1);
624 a->nsh_entry.md.md1_data.c2 = ntohl (mp->c2);
625 a->nsh_entry.md.md1_data.c3 = ntohl (mp->c3);
626 a->nsh_entry.md.md1_data.c4 = ntohl (mp->c4);
628 else if (mp->md_type == 2)
630 tlvs_len = mp->tlv_length;
631 vec_validate_aligned (data, tlvs_len - 1, CLIB_CACHE_LINE_BYTES);
633 clib_memcpy (data, mp->tlv, tlvs_len);
634 a->nsh_entry.tlvs_data = data;
635 a->nsh_entry.tlvs_len = tlvs_len;
638 rv = nsh_add_del_entry (a, &entry_index);
640 REPLY_MACRO2 (VL_API_NSH_ADD_DEL_ENTRY_REPLY, (
649 vl_api_nsh_entry_dump_t_handler (vl_api_nsh_entry_dump_t * mp)
651 nsh_main_t *nm = &nsh_main;
654 vl_api_registration_t *rp;
656 rp = vl_api_client_index_to_registration (mp->client_index);
660 entry_index = ntohl (mp->entry_index);
662 if (~0 == entry_index)
664 pool_foreach (t, nm->nsh_entries, (
666 send_nsh_entry_details (t, rp,
673 if (entry_index >= vec_len (nm->nsh_entries))
677 t = &nm->nsh_entries[entry_index];
678 send_nsh_entry_details (t, rp, mp->context);
683 setup_message_id_table (nsh_main_t * nm, api_main_t * am)
685 #define _(id,n,crc) \
686 vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id + nm->msg_id_base);
687 foreach_vl_msg_name_crc_nsh;
691 /* Set up the API message handling tables */
692 static clib_error_t *
693 nsh_plugin_api_hookup (vlib_main_t * vm)
695 nsh_main_t *nm __attribute__ ((unused)) = &nsh_main;
697 vl_msg_api_set_handlers((VL_API_##N + nm->msg_id_base), \
699 vl_api_##n##_t_handler, \
701 vl_api_##n##_t_endian, \
702 vl_api_##n##_t_print, \
703 sizeof(vl_api_##n##_t), 1);
704 foreach_nsh_plugin_api_msg;
711 nsh_api_init (vlib_main_t * vm, nsh_main_t * nm)
716 name = format (0, "nsh_%08x%c", api_version, 0);
719 nm->msg_id_base = vl_msg_api_get_msg_ids
720 ((char *) name, VL_MSG_FIRST_AVAILABLE);
722 error = nsh_plugin_api_hookup (vm);
724 /* Add our API messages to the global name_crc hash table */
725 setup_message_id_table (nm, &api_main);
733 * fd.io coding-style-patch-verification: ON
736 * eval: (c-set-style "gnu")